Are you asking for something like
{
justify-self: justify;
}
?
The "space-around" choice may seem strange to you, but it's at least
consistent with the first choice that was voted: you can't decently use a
part of a property name as its value to mean something different that it
uses to mean in the property name.
This is not to say I like the whole "justify" thing, but at some point the
WG need to make a decision, isn't it?